How to use it
- Enter the loan amount.
- Set the annual interest rate.
- Choose the loan term in years and click Calculate.
What you get: The calculator takes your loan amount, annual interest rate and term, then instantly shows three numbers – the monthly payment you’ll owe, the total interest you’ll pay over the life of the loan, and the grand total of all payments. Knowing the monthly payment helps you budget your cash flow, while the total interest reveals the true cost of borrowing. Compare different rates or terms to see how a few percentage points or an extra year affect your wallet. Read the results: the monthly figure is what you’ll pay each month, the total interest is the extra amount over the principal, and the total of payments is principal plus interest. Use these numbers to negotiate, refinance, or simply confirm you can afford the house. You can also experiment with different down‑payment amounts to see how they shrink the monthly bill.
Pro tips
- Round the interest rate to two decimals for more accurate results.
- Add a small buffer (5‑10%) to the monthly payment to cover occasional extra costs.
- Try both 15‑year and 30‑year terms to see the interest trade‑off.
- Remember the calculator assumes a fixed rate; variable rates will change over time.
Real-life examples
- First‑time homebuyer checking if a $250k mortgage fits her budget.
- Refinance candidate comparing 4% vs 3.5% rates over different terms.
- Investor estimating cash flow on a rental property loan.
Case study
Sarah wanted to know if a $300,000 loan at 4.5% for 30 years fit her budget. The calculator showed a $1,520 monthly payment, $274,000 total interest and $574,000 total cost. She adjusted the term to 20 years, saw the payment rise to $1,897, but total interest drop to $155,000, helping her decide on a shorter loan.